CN206439185U - Lobe pump - Google Patents
Lobe pump Download PDFInfo
- Publication number
- CN206439185U CN206439185U CN201720088042.4U CN201720088042U CN206439185U CN 206439185 U CN206439185 U CN 206439185U CN 201720088042 U CN201720088042 U CN 201720088042U CN 206439185 U CN206439185 U CN 206439185U
- Authority
- CN
- China
- Prior art keywords
- rotor
- section
- housing
- arc section
- lobe pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a kind of lobe pump, including housing, suction chamber is provided with the housing, rotor, rotary shaft are provided with suction chamber, the rotor, rotary shaft are two, rotor is two-leaved, and the profile of rotor includes the first arc section, conjugate curves section, involute section, the second arc section, the three-arc section being sequentially connected, and first arc section is with conjugation curved section, involute section, the second arc section, three-arc section according to smooth connection；The upper end of the housing is on the pressure side, the lower end of housing is also to include being provided with valve in interface channel, interface channel in suction side, housing；The beneficial effects of the utility model are：By adopting the above-described technical solution, compared with prior art, lobe pump of the present utility model reduces the engagement points of rotor, reduction molded lines of rotor interference probability, it is to avoid rotor is stuck, improves operating efficiency, extends the physical life of lobe pump.
Description
Technical field
The utility model is related to field of mechanical technique, and in particular to a kind of lobe pump.
Background technology
Lobe pump is a kind of vavuum pump without interior compression, and usual compression ratio is very low, so middle and high vavuum pump needs prime
Pump.The final vacuum of lobe pump additionally depends on prime in addition to depending on lobe pump structure in itself and the precision of manufacture
Lobe pump, in order to improve the final vacuum of lobe pump, can be used in series, the operation principle of lobe pump by the end vacuum of pump
Similar to Roots blower, due to the continuous rotation of rotor, pumped gas is drawn into the suction between rotor and pump case from air inlet
Enter intracavitary, then by exhaust outlet discharge, because the suction chamber after air-breathing is totally enclosed state, so, the gas in suction chamber
Body is not compressed and expanded, but when exhaust outlet edge is turned at the top of rotor, suction chamber is communicated with exhaust side, due to exhaust
The pressure of side gas is higher, then some gas recoils into suction chamber, the pressure of gas is increased suddenly, when rotor after
During continuous rotation, outside gas excavationg pump, lobe pump has the rotor of two 8-shaped flat installed in a pair mutual vertically in pump chamber
On row axle, two rotors are driven to make synchronous rotary motion reversely with each other for 1 a pair of gears by gearratio, in rotor and rotor
Between, between rotor and pump housing endophragm, maintain certain gap, it is possible to achieve high rotating speed operation.Existing lobe pump by
Error necessarily occurs in machining and assembling, the rotor multi point engagement motion of lobe pump will attend to one thing and lose sight of another, can cause to turn
Subtype line is interfered, and the stuck phenomenon of rotor occurs, influences the service life of lobe pump, reduces operating efficiency.
Utility model content
In order to overcome defect present in above-mentioned prior art, the utility model provides a kind of lobe pump, reduces and turns
The engagement points of son, the probability of reduction molded lines of rotor interference, it is to avoid rotor is stuck, improves operating efficiency, improves making for lobe pump
Use the life-span.
The utility model is provided to be provided with suction chamber, the suction chamber in a kind of lobe pump, including housing, the housing
Provided with rotor, rotary shaft, the rotor, rotary shaft are two, and the rotor is two-leaved, and the profile of the rotor includes the
One arc section, first arc section smoothly connects successively with conjugation curved section, involute section, the second arc section, three-arc section
Connect；The upper end of the housing is on the pressure side, the lower end of the housing is also to include interface channel, institute in suction side, the housing
State and valve is provided with interface channel.
The valve includes flap, pivot, torsion spring.
The pivot is arranged on side of the interface channel away from suction chamber.
The pivot is parallel with the extension of rotary shaft.
The center of gravity of the flap is overlapped with pivot.
Described conjugate curves section is the curved section being conjugated with the second arc section.
By adopting the above-described technical solution, compared with prior art, the utility model provides a kind of lobe pump, reduce
The engagement points of rotor, reduction molded lines of rotor interference probability, it is to avoid rotor is stuck, improves operating efficiency, extend Roots
The physical life of pump.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of rotor in the utility model；
Fig. 3 is the structural representation of valve in the utility model；
Reference：
1st, housing 2, suction chamber 3, interface channel 4, valve 5, suction side 6, on the pressure side
7th, rotary shaft 8, rotor 9, the first circular arc 10, conjugate curves section 11, involute section
12nd, the second arc section 13, three-arc section 14, pivot 15, torsion spring 16, flap
17th, passage opening.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be noted that herein
Described embodiment is merely to illustrate and explained the utility model, is not limited to the utility model.
As shown in Figure 1, Figure 2, Figure 3 shows, the utility model is provided sets in a kind of lobe pump, including housing 1, the housing 1
Have and rotary shaft 7, rotor 8 are provided with suction chamber 2, the suction chamber 2, the rotary shaft 7, rotor 8 are two, the rotor 8
For two-leaved, the first arc section 9 that the profile of the rotor 8 includes being sequentially connected, conjugate curves section 10, involute section 11, the
Two arc sections 12, three-arc section 13, first arc section 9, conjugate curves section 10, involute section the 11, second arc section 12,
It is in smoothing junction between three-arc section 13；The upper end of the housing 1 is on the pressure side 6, and the lower end of the housing 1 is suction side 5, institute
Stating also includes interface channel 3 in housing 1, the interface channel 3 on the pressure side 6 is connected to suction side 5 by described；The interface channel
Valve 4, passage opening 17 are provided with 3.Rotor 8 rotates around rotary shaft 14, by the action of rotor 8, by medium from suction side 5 to pressure
The side of power side 6 is passed up, and in order to avoid overheat, interface channel 3 is provided with the case 1, interface channel 3 is in suction chamber 2
The extension of side, interface channel 3 preferably stretches along the width of housing 1, therefore, the preferred rectangular cross section of interface channel,
Valve 4 is set in the interface channel 3, and when more than maximum differential pressure between on the pressure side 6 and suction side 5, valve 4 will automatically turn on, and lead to
Road opening 17 is opened, and on the pressure side 6 will be connected with suction side 5, thus realize make a part transmission fluid along interface channel 3 from
On the pressure side 6 suction side 5 is back to, rotor 8 is during engagement, because in the absence of angle point, engagement points are by general lobe pump
In five point gearing be reduced to three point gearing, engagement points are reduced, then the rotor-type that machining error and rigging error are caused
Line interference probability reduction, it is to avoid rotor is stuck, improves operating efficiency, extends the physical life of lobe pump.In addition, rotor 8
The sealing cavity area that backflows reduces, and the compressed gas that backflows of inclosure is greatly decreased, and reduces reflux rate.
The valve 4 includes pivot 14, torsion spring 15, flap 16.Valve 4 include pivot 14, torsion spring 15, flap 16, flap 16 around
Pivot 14 is pivoted, by around torsion spring 15, confining force and corresponding closing forces being applied on flap 16, only when suction chamber 2
Pressure when reaching on the pressure side restriction pressure difference between 6 and suction side 5, valve 4 is just opened.
The pivot 14 is arranged on side of the interface channel 3 away from suction chamber 2.The pivot 14 is arranged far from pumping
On the side for entering chamber 2, so that in order to open flap 16, flap 16 goes to pivot 14 in the corner of housing 1, now the institute of clack valve 16
The structure space very little needed, so pump case 1 can have relatively small external dimensions.
The pivot 14 is parallel with the extension of the axis of rotary shaft 7.
The center of gravity of the flap 16 is overlapped with pivot 14.
Described conjugate curves section 10 is the curved section being conjugated with the second arc section 12.
The utility model provides a kind of lobe pump, by setting involute the 11, second arc section 12 of section, reduces engagement
Points, make molded lines of rotor interfere probability reduction, it is to avoid rotor 8 it is stuck, be more prone to processing and assembling, improve work
Efficiency, extends the operating efficiency of lobe pump.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, still, the utility model is not limited to
The detail in embodiment is stated, can be to technical side of the present utility model in range of the technology design of the present utility model
Case carries out a variety of simple variants, and these simple variants belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means, in order to avoid unnecessary repetition, how each the utility model is
Possible combination is planted no longer separately to illustrate.
In addition, can also be combined between a variety of embodiments of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (5)
1. a kind of lobe pump, including housing (1), it is characterised in that suction chamber (2), the suction chamber are provided with the housing (1)
(2) rotary shaft (7), rotor (8) are provided with, the rotary shaft (7), rotor (8) are two, the rotor (8) is two-leaved,
The profile of the rotor (8) is included according to the first arc section (9), first arc section (9) and conjugation curved section (10), involute
Section (11), the second arc section (12), three-arc section (13) are in smoothing junction successively；The upper end of the housing (1) is on the pressure side
(6), the lower end of the housing (1) is also to include interface channel (3), the interface channel in suction side (5), the housing (1)
(3) valve (4), passage opening (17) are provided with.
2. lobe pump according to claim 1, it is characterised in that the valve (4) includes pivot (14), torsion spring (15), valve
Valve (16).
3. lobe pump according to claim 2, it is characterised in that the pivot (14) is arranged in interface channel (3) far
On side from suction chamber (2).
4. lobe pump according to claim 2, it is characterised in that the center of gravity of the flap (16) is overlapped with pivot (14).
5. lobe pump according to claim 1, it is characterised in that the conjugate curves section (10) is and the second arc section
(12) curved section of conjugation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088042.4U CN206439185U (en) | 2017-01-23 | 2017-01-23 | Lobe pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088042.4U CN206439185U (en) | 2017-01-23 | 2017-01-23 | Lobe pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206439185U true CN206439185U (en) | 2017-08-25 |
Family
ID=59635553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720088042.4U Expired - Fee Related CN206439185U (en) | 2017-01-23 | 2017-01-23 | Lobe pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206439185U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2571792A (en) * | 2018-03-09 | 2019-09-11 | Edwards Ltd | A vacuum pump with a pressure relief valve |
-
2017
- 2017-01-23 CN CN201720088042.4U patent/CN206439185U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2571792A (en) * | 2018-03-09 | 2019-09-11 | Edwards Ltd | A vacuum pump with a pressure relief valve |
| GB2571792B (en) * | 2018-03-09 | 2020-12-16 | Edwards Ltd | A vacuum pump with a pressure relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170825 Termination date: 20210123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |